(computing, programming) A software development technique, part of extreme programming, in which two programmers work together at a single keyboard, one coding while the other observes and reviews. The roles are often switched at regular intervals.

A pair of twins, one male and one female. / Two siblings, one male and one female.

(chiefly US, colloquial, idiomatic, somewhat vulgar) To be brave; to show some courage, especially in a situation in which one has so far failed to do so.

(poker) Alternative form of two pair

(advertising) A technique in which two or more competing products are compared in such a manner that certain good qualities are connected, while one product is made to appear more beneficial or desirable than its competitors.

plural of pocket pair

plural of au pair

plural of homologous pair

plural of kilobase pair

(genetics) One thousand base pairs in succession (used as a measure of the size of a nucleic acid or a gene)